1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // UNSUPPORTED: libcpp-has-no-threads 11 12 // <mutex> 13 14 // template <class Mutex> class unique_lock; 15 16 // void unlock(); 17 18 #include <mutex> 19 #include <cassert> 20 21 bool unlock_called = false; 22 23 struct mutex 24 { lockmutex25 void lock() {} unlockmutex26 void unlock() {unlock_called = true;} 27 }; 28 29 mutex m; 30 main()31int main() 32 { 33 std::unique_lock<mutex> lk(m); 34 lk.unlock(); 35 assert(unlock_called == true); 36 assert(lk.owns_lock() == false); 37 try 38 { 39 lk.unlock(); 40 assert(false); 41 } 42 catch (std::system_error& e) 43 { 44 assert(e.code().value() == EPERM); 45 } 46 lk.release(); 47 try 48 { 49 lk.unlock(); 50 assert(false); 51 } 52 catch (std::system_error& e) 53 { 54 assert(e.code().value() == EPERM); 55 } 56 } 57